Vane strut positioning and securing systems including locking washers

Patent metadata

Field	Value
Publication number	US-10570762-B2
Application number	US-201514713002-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	May 15, 2015
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A vane strut positioning and securement system includes a housing including a washer aperture defined in an inner diameter thereof and a lock washer disposed within the washer aperture of the housing, the lock washer configured to lock a vane strut orientation under compression against a vane strut washer. The washer aperture is defined partially through a thickness of the housing, and the housing includes a strut post opening defined through the housing from the inner diameter to an outer diameter of the housing.

First claim

What is claimed is:

1. A vane strut positioning and securement system, comprising:
a housing including a washer aperture defined in an inner diameter thereof, the washer aperture defined partially through a thickness of the housing, wherein the housing further includes a strut post opening defined through the housing from the inner diameter to an outer diameter of the housing;
a lock washer disposed within the washer aperture of the housing, the lock washer configured to lock a vane strut orientation under compression against a vane strut washer, wherein the lock washer or the vane strut washer has a compression lock interface that compresses or deforms into to the other of the vane strut washer or the lock washer when the vane strut orientation is secured to the housing, wherein the compression lock interface includes material that is harder than the vane strut washer such that the vane strut washer deforms under compression against the compression lock interface of the lock washer; and
a vane strut defining a leading edge of a vane airfoil, the vane strut including a strut post and the vane strut washer disposed in a strut washer aperture thereof, wherein the strut post includes threading on an outer surface thereof and is configured to mate with a locking nut to compress the vane strut to the housing.

2. The system of claim 1 , wherein the strut post opening is defined through a center of the washer aperture of the housing.

3. The system of claim 1 , wherein the lock washer includes a flat portion including the compression lock interface.

4. The system of claim 3 , wherein the flat portion is annular.

5. The system of claim 3 , wherein the lock washer includes a post portion configured to fit within the strut post opening and to allow a vane post to be inserted therethrough.

6. The system of claim 3 , wherein the compression lock interface includes at least one of knurling, radial serrations, cubic boron nitride coating, aluminum oxide coating, or colloidal silica.

7. The system of claim 3 , wherein the lock washer is press fit into the washer aperture of the housing.

8. A vane strut positioning and securement system, comprising:
a housing including a washer aperture defined in an inner diameter thereof, the washer aperture defined partially through a thickness of the housing, wherein the housing further includes a strut post opening defined through the housing from the inner diameter to an outer diameter of the housing;
a lock washer disposed within the washer aperture of the housing, the lock washer configured to lock a vane strut orientation under compression against a vane strut washer, wherein the lock washer or the vane strut washer has a compression lock interface that compresses or deforms into the other of the vane strut washer or the lock washer when the vane strut orientation is secured to the housing, wherein the compression lock interface includes material that is harder than the vane strut washer such that the vane strut washer deforms under compression against the compression lock interface of the lock washer; and
a vane strut defining a leading edge of a vane airfoil, the vane strut including a strut post and the vane strut washer disposed in a strut washer aperture thereof, wherein the strut post includes threading on an outer surface thereof and configured to mate with a locking nut to compress the vane strut to the housing, wherein the vane strut washer is press fit into the strut washer aperture.

9. The system of claim 1 , wherein the lock washer includes:
a flat portion including the compression lock interface, the lock washer defining a strut post orifice to allow the strut post to pass therethrough; and
a post portion extending from the strut post orifice and configured to fit within the strut post opening wherein the strut post opening is located in the housing.

10. The system of claim 9 , wherein the flat portion is annular.

11. The system of claim 9 , wherein the compression lock interface includes at least one of knurling, radial serrations, cubic boron nitride coating, aluminum oxide coating, or colloidal silica.

12. The system of claim 9 , wherein the compression lock interface is defined on less than all of the flat portion.

13. The system of claim 9 , wherein at least one channel is defined in the flat portion.

14. A turbomachine for an aircraft, comprising:
a housing including a washer aperture defined in an inner diameter thereof, the washer aperture defined partially through a thickness of the housing, wherein the housing further includes a strut post opening defined through the housing from the inner diameter to an outer diameter of the housing;
a vane, including:
a vane strut defining a leading edge of a vane airfoil, the vane strut including a strut post disposed within the strut post opening and a vane strut washer disposed in a strut washer aperture thereof, wherein the strut post includes threading on an outer surface thereof and configured to mate with a locking nut to compress the vane strut to the housing; and
a vane flap movably mounted relative to the vane strut and the housing to change an aerodynamic shape of the vane; and
a lock washer disposed within the washer aperture of the housing, the lock washer configured to lock a vane strut orientation under compression against the vane strut washer.

15. The turbomachine of claim 14 , wherein the strut post opening is defined through a center of the washer aperture of the housing.

16. The turbomachine of claim 14 , wherein the lock washer includes a flat portion including a compression lock interface.

17. The turbomachine of claim 16 , wherein the flat portion of the lock washer is annular.

Assignees

• United Technologies Corp

Inventors

• Dibenedetto Enzo
• Bintz Matthew E

Classifications

• F05D2300/211

  Silica · CPC title

• F16B39/24

  by means of washers, spring washers, or resilient plates that lock against the object (locking to the screw-thread F16B39/14 {, F16B39/34}, F16B39/36) · CPC title

• F16B2/005

  Means to increase the friction-coefficient · CPC title

• F16B39/282

  Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts · CPC title

• F05D2250/28

  patterned · CPC title